test: remove obsolete test script.

Signed-off-by: Emmanuel Roullit <emmanuel.roullit@gmail.com>
test: use DUMMY_DEV when creating dummy devices.

Test steps using the 'dummy' kernel module use be marked by the DUMMY_DEV
prerequisite. When the 'dummy' kernel module is not present, such steps
are skipped properly.

Signed-off-by: Emmanuel Roullit <emmanuel.roullit@gmail.com>
test: remove redundant dummy interface creation.

Signed-off-by: Emmanuel Roullit <emmanuel.roullit@gmail.com>
test: test if the promiscuous can set properly.

Signed-off-by: Emmanuel Roullit <emmanuel.roullit@gmail.com>
test: check more carefully 'interface driver' output.

Signed-off-by: Emmanuel Roullit <emmanuel.roullit@gmail.com>
test: check carefully 'interface pause' output.

Signed-off-by: Emmanuel Roullit <emmanuel.roullit@gmail.com>
test: check carefully 'interface offload' output.

Signed-off-by: Emmanuel Roullit <emmanuel.roullit@gmail.com>
test: remove unused function.

Signed-off-by: Emmanuel Roullit <emmanuel.roullit@gmail.com>
dabba: adjust argc/argv in 'interface modify settings'.

Signed-off-by: Emmanuel Roullit <emmanuel.roullit@gmail.com>